My ex showed up at my gym?!

He ignored me then sent me a text later saying he didn’t know I still went there and apologised if I felt uncomfortable but his best mate and sister know and I’m tagged in posts being there by mutual friends
He’s in a relationship (he unblocked me the 5 days later puts in a relationship- he doesn’t know I know)
He sent me a text for my bday
If I make a comment on a mutual friends fb status he’ll like thier response to my comment but not mine and comment under mine so I see his name pop up

Stay out of each others lives and that means no "accidental" or intentional bumping into places where you know they will be there and not pretending you didn't know, blocking and walking without looking back.

I think FB has a lot to answer for. The whole world is hung up on who is liking what from everybody & none of it is even remotely interesting.
Try real life instead, talk to people with your mouth, listen with your ears & they will ‘like’ you more